/* ── Reset & Base ─────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg:        #000000;
  --surface:   #0d0d12;
  --border:    #1a1a2e;
  --text:      #e0e0e0;
  --text-dim:  #6b6b80;
  --purple:    #a855f7;
  --purple-g:  #7c3aed;
  --pink:      #ec4899;
  --pink-g:    #db2777;
  --accent:    #c084fc;
  --energy-p1: #a855f7;
  --energy-p2: #ec4899;
  --red:       #ef4444;
  --green:     #22c55e;
  --radius:    8px;
  --transition: 0.35s cubic-bezier(.4,0,.2,1);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  overflow: hidden;
}

/* ── Screens ─────────────────────────────────────── */
.screen {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.screen.hidden { display: none; }

/* ── Auth Gate ───────────────────────────────────── */
.auth-box {
  text-align: center;
  padding: 3rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.auth-box h1 {
  font-size: 2rem;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1.5rem;
  letter-spacing: 0.15em;
}
.auth-msg {
  font-size: 1.2rem;
  color: var(--red);
  margin-bottom: 0.5rem;
}
.auth-sub {
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* ── Lobby ───────────────────────────────────────── */
.lobby-container {
  text-align: center;
  width: 100%;
  max-width: 440px;
  padding: 2rem;
}
.title {
  font-size: 2.5rem;
  letter-spacing: 0.2em;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.25rem;
}
.subtitle {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 2.5rem;
}

.lobby-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}
.join-group {
  display: flex;
  gap: 0.5rem;
}
.join-group input {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem 1rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  outline: none;
  width: 180px;
  transition: border-color var(--transition);
}
.join-group input:focus {
  border-color: var(--purple);
}

.room-info {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.room-info p {
  margin-bottom: 0.5rem;
}
.room-info span {
  color: var(--accent);
  font-family: monospace;
  font-size: 1.1rem;
}

.error-msg {
  margin-top: 1rem;
  color: var(--red);
  font-size: 0.9rem;
}

/* ── Buttons ─────────────────────────────────────── */
.btn {
  padding: 0.65rem 1.6rem;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.04em;
}
.btn:active { transform: scale(0.96); }
.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

.btn--primary {
  background: linear-gradient(135deg, var(--purple-g), var(--purple));
  color: #fff;
}
.btn--primary:hover:not(:disabled) {
  box-shadow: 0 0 20px rgba(168,85,247,0.4);
}

.btn--secondary {
  background: var(--surface);
  color: var(--accent);
  border: 1px solid var(--purple-g);
}
.btn--secondary:hover:not(:disabled) {
  background: rgba(168,85,247,0.1);
}

.btn--accent {
  background: linear-gradient(135deg, var(--pink-g), var(--pink));
  color: #fff;
}
.btn--accent:hover:not(:disabled) {
  box-shadow: 0 0 20px rgba(236,72,153,0.4);
}

/* ── Battle Screen ───────────────────────────────── */
.battle-container {
  width: 100%;
  max-width: 900px;
  padding: 2rem;
  position: relative;
}

/* Phase */
.phase-banner {
  text-align: center;
  margin-bottom: 2rem;
}
#phase-label {
  display: inline-block;
  padding: 0.4rem 1.6rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--surface);
  transition: all var(--transition);
}
#phase-label.phase--countdown { border-color: var(--pink); color: var(--pink); }
#phase-label.phase--active    { border-color: var(--green); color: var(--green);
  box-shadow: 0 0 12px rgba(34,197,94,0.3);
}
#phase-label.phase--finished  { border-color: var(--red); color: var(--red); }

/* Arena Grid */
.arena {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.5rem;
  align-items: start;
  margin-bottom: 2.5rem;
}

/* Player Column */
.player-col {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.player-name {
  font-size: 1rem;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  text-transform: uppercase;
}
.player-col--left .player-name  { color: var(--purple); }
.player-col--right .player-name { color: var(--pink); }

/* Energy Bar */
.energy-bar-wrap {
  height: 14px;
  background: rgba(255,255,255,0.05);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 0.4rem;
}
.energy-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--purple-g), var(--purple));
  border-radius: 100px;
  transition: width var(--transition);
}
.energy-bar--p2 {
  background: linear-gradient(90deg, var(--pink-g), var(--pink));
}
.energy-value {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-family: monospace;
}

/* Dominance */
.dominance-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  min-width: 140px;
  padding-top: 1rem;
}
.dominance-label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}
.dominance-track {
  position: relative;
  width: 14px;
  height: 200px;
  background: rgba(255,255,255,0.05);
  border-radius: 100px;
  overflow: hidden;
}
.dominance-fill {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(to top, var(--purple), var(--pink));
  border-radius: 100px;
  transition: height var(--transition);
  height: 50%;
}
.dominance-marker {
  display: none;
}
.dominance-values {
  display: flex;
  justify-content: space-between;
  width: 100%;
  font-family: monospace;
  font-size: 0.8rem;
}
.dominance-values span:first-child { color: var(--purple); }
.dominance-values span:last-child  { color: var(--pink); }

/* ── Action Buttons ──────────────────────────────── */
.actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

.btn--attack {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
  color: #fff;
}
.btn--attack:hover:not(:disabled) { box-shadow: 0 0 16px rgba(168,85,247,0.5); }

.btn--defend {
  background: linear-gradient(135deg, #0891b2, #22d3ee);
  color: #000;
}
.btn--defend:hover:not(:disabled) { box-shadow: 0 0 16px rgba(34,211,238,0.5); }

.btn--burst {
  background: linear-gradient(135deg, #db2777, #ec4899);
  color: #fff;
}
.btn--burst:hover:not(:disabled) { box-shadow: 0 0 16px rgba(236,72,153,0.5); }

.btn--focus {
  background: linear-gradient(135deg, #ca8a04, #facc15);
  color: #000;
}
.btn--focus:hover:not(:disabled) { box-shadow: 0 0 16px rgba(250,204,21,0.5); }

/* ── Result Overlay ──────────────────────────────── */
.result-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(6px);
  z-index: 10;
}
.result-overlay.hidden { display: none; }

.result-box {
  text-align: center;
  padding: 3rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
#result-title {
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--purple), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
#result-reason {
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 640px) {
  .arena {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .dominance-col {
    flex-direction: row;
    min-width: unset;
    padding-top: 0;
  }
  .dominance-track {
    width: 100%;
    height: 14px;
  }
  .dominance-fill {
    height: 100% !important;
    width: 50%;
    bottom: unset;
    left: 0;
    transition: width var(--transition);
  }
  .actions {
    grid-template-columns: repeat(2, 1fr);
  }
}